Download External Forces Shaping the Earth

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts

Weathering wikipedia, lookup

SahysMod wikipedia, lookup

Soil contamination wikipedia, lookup

Soil salinity control wikipedia, lookup

Erosion wikipedia, lookup

Surface runoff wikipedia, lookup

Pedosphere wikipedia, lookup

Soil microbiology wikipedia, lookup

Soil horizon wikipedia, lookup

Canadian system of soil classification wikipedia, lookup

Crop rotation wikipedia, lookup

Tillage wikipedia, lookup

No-till farming wikipedia, lookup

Terra preta wikipedia, lookup

Soil food web wikipedia, lookup

Soil compaction (agriculture) wikipedia, lookup

Cover crop wikipedia, lookup

Soil respiration wikipedia, lookup

Soil erosion wikipedia, lookup

Laterite wikipedia, lookup

River bank failure wikipedia, lookup

Transcript
External Forces Shaping
the Earth
Weathering

Weathering refers to physical and
chemical processes that change the
characteristics of rock on or near the
earth’s surface.

Weathering processes create smaller
and smaller pieces of rock called
sediment.
Mechanical Weathering


Processes that break rock into
smaller pieces are referred to as
mechanical weathering.
Agents that can break apart rocks
include: running water, plant roots,
ice (glaciers), and temperature.
Chemical Weathering

Occurs when rock is changed into a
new substance as a result of
interaction between elements in the
air or water and the minerals in the
rock.
Erosion



Occurs when weathered material is
moved by the action of wind, water,
ice, or gravity.
For erosion to occur, a transporting
agent, such as water or wind must
be present.
When a river enters the ocean, the
sediment is deposited in a fan like
landform called a delta.
Wind Erosion


Wind can also transport and eposit
sediment in other locations.
Loess is windblown silt and clay
sediment that produces very fertile
soil.
Glacial Erosion



A glacier is a large, long lasting
mass of ice that moves because of
gravity.
Glaciation is the changing of
landforms by slowly moving glaciers.
Rocks left behind by a glacier may
form a ridge called a moraine.
Building Soil






Organic material in the soil is called
humus.
Soil has parent material or the chemical
composition of the rock it is made of.
The relief is a factor in soil production as
steeper slopes erode more quickly
The organisms in the area provide
material for soil.
Warmer climates produce different soil.
The amount of time is also a factor in soil
production.